Bring your business to your customers' phones

We help service businesses turn real-world services into simple, useful digital products for end customers.

From meal planning apps for busy families to communication tools for foreign caregivers, we design and build apps that solve your customers' problems and grow your business. We start with discovery — not code — to understand what your customers actually need. Then we guide you from first prototype to a reliable, production-ready app your customers truly use and trust.

App Entwicklung Fishtail Product Lab

Customer Feedback

In Short

Made by Fishtail

MealPrapp Fishtail Product Lab MealPrapp Fishtail Product Lab

MealPrapp - The Nutrition App for Easy, Intuitive Meal Planning

Product: Mobile App for iOS & Android, including Web App (Admin Panel)
Industry: Fitness & Nutrition, Germany

We developed the MealPrapp for our client Easy Meal Prep. The app helps busy moms and families plan healthy meals conveniently.

The MealPrapp is seamlessly integrated into our client’s business model and serves as a growth driver for their coaching business.

App Entwicklung Fishtail Janina München App Entwicklung Fishtail Janina München

sanu — The Productivity App for Care Without Language Barriers

Product: Mobile App for iOS & Android, including Web App
Industry: Elderly Care, Germany

sanu is our flagship, in-house, investor-backed product. The app enables caregivers and families to overcome language barriers in home care.

With Sanu, we launched several pilot projects with care agencies and created a new business model for home care services.

Why Pay Us When AI Can Build It For Free?

Because low-code tools only give you a throwaway version - unless you are a developer yourself. Our packages also include prototypes and MVPs to test ideas and learn quickly, but the final product is a production-ready app that gives you business value from day one — something a free AI prototype simply can’t deliver.

Integration with Your Business
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Throwaway prototypes are usually standalone, not integrated with your workflows. Your app will fit seamlessly into your business operations — payment systems, customer databases, notifications, etc.

Reliability & Stability
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AI or low-code prototypes often crash, have bugs, or fail under load.
A professional app is tested thoroughly, performs reliably, and can scale with your business.

User Experience & Design
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AI-generated apps often look generic and confusing, which can turn users away. A custom app is designed for your specific audience, creating a smooth, engaging experience.

Long-Term Value & Ownership
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Free tools or AI may lock you into their platform or require constant rework. A professional app is fully owned by you, maintainable, and ready for future updates.

Support & Maintenance
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Free prototypes have no support; if something breaks, you’re on your own. With a professional app, you get ongoing guidance, updates, and troubleshooting.

Professional Credibility
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Your customers trust a polished, reliable app more than a buggy DIY version. A well-built app enhances your brand reputation.

Security & Compliance
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Free tools rarely include data protection, secure authentication, or compliance with privacy regulations. A professionally built app protects your customers’ data and reduces legal risk.

Our All-Inclusive Pricing

Our packages cover everything you need for a successful app — from the first idea to launch: product discovery, UI/UX design, development & testing, deployment, and project management.

  • App-Entwicklung München

    MINI

    From 35K USD
    For small businesses ready to get their simple app idea off the ground. We build up to 2 core features in a tailored, production-ready app — not a throwaway prototype like free DIY or low-code tools — giving you a reliable foundation to introduce your app with minimal risk and budget.
  • App-Entwicklung München

    STARTER

    From 45K USD
    For businesses that have validated their idea and are ready to launch a comprehensive app. We build up to 3–5 core features and include a complementary web app as an admin panel alongside the mobile app, delivering a robust, production-ready solution.
  • App-Entwicklung München

    GROWTH

    Individual offer
    Businesses with an existing app ready to grow, add new features, and reach new markets. We develop a more advanced version with enhanced features, improved usability, and optimized performance, designed to scale your app, attract new customers, and expand your business.
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TOO EXPENSIVE? NOT QUITE SURE YET?

Got an app idea but not yet confident to jump into development? That’s normal — and actually smart. Too many app projects fail, not because of technology, but because no one paused at the start to ask: “Does this idea really solve a problem for my customers?” Don’t risk wasting time or money building features that won’t matter.

Our Product Discovery & MVP Definition Sprints help you answer these key questions and lay the foundation for a successful app:

  • What problems should your app solve for your business and your users?
  • How does it fit into your business model?
  • Which feature ideas truly matter now and which are unnecessary (or for later)?
  • How to translate ideas into concrete features?
  • Are there any hidden assumptions and risks?

OUTPUTS:

  • Defined MVP scope with development-ready features: A validated and prioritized backlog of epics, features, and user stories, ready to hand over to any development team.
  • Main user journeys and navigation flows: Wireframes, clickdummies, or no-code prototypes of core screens, suitable for user feedback, pitching, and early validation.
  • High-level technical concept: Recommended technical approach, key assumptions, potential risks, and suggested development setup (platforms and architecture overview).
  • Fixed-price development offer for Phase B: Clearly defined scope, timeline, and budget based on the validated MVP and technical concept.

By the end of Discovery, you’ll have clarity and confidence to move forward.

Duration: 4-6 weeks
Price: 5K USD

“Product Lab” — What Does It Really Mean?

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For us, apps are more than just technical coding projects. Instead of jumping straight into development, we first figure out what truly matters for your business. To make the most of your resources, we dive deep into your idea and your customers’ problems.

Even after the first app version is launched, we stay by your side to continuously improve the product. That’s why we call ourselves a “Product Lab” rather than a “Project Team” or "Feature Factory": we think beyond technical details, budgets, and deadlines to develop a product that succeeds in the long term.

For you, it means working with a partner who is as invested in your success as you are.

Fishtail Product Lab Janina

Janina

Founder & CEO

From Idea to Launch — and Beyond

  • 1

    Get to Know Each Other & Offer

    In an initial free conversation — via video call or in person — we get to know each other and your idea, completely without obligation.

  • 2

    Discovery

    Wasting time and money on the wrong features? Not with us. Before we dive into technical development, we explore in detail what your app’s users truly need.

  • 3

    UI & UX Design

    Once we understand user needs and have defined the features, we make sure your app not only looks great, but feels great to use.

  • 4

    Development & Testing

    With the design in place, we start a proven development process: from technical planning and iterative implementation to quality assurance and testing.

  • 5

    Deployment

    Once all features are developed and tested, it’s time for launch — the moment your vision becomes reality.

  • 6

    Repeat & Grow

    Our work doesn’t stop at launch. We stay with you to support long-term growth, improvements, and scaling.

Von der Idee zum Launch und weiter

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    Kennenlernen & Angebot

    In einem ersten Gespräch – per Video-Call oder persönlich – lernen wir uns unverbindlich kennen. Hier besprechen wir deine Idee, geben dir eine grobe Einschätzung zu Zeit und Kosten und klären deine Fragen zum Ablauf. Nach diesem Gespräch weißt du genau, wie wir dich auf dem Weg zu deinem Ziel unterstützen können.

    Dabei möchten wir auch einen Eindruck davon bekommen, wie klar die Anforderungen an die App-Features bereits sind. Falls die Anforderungen noch nicht vollständig definiert sind – was ganz normal ist, also kein Grund zur Sorge – werden wir in unserem Angebot eine umfassende Discovery-Phase berücksichtigen. 

    In jedem Fall erhältst du schon kurze Zeit nach unserem Kennenlernen ein realistisches und flexibles Angebot, das sich exakt an deinen Bedürfnissen orientiert.

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    Discovery (Das macht uns besonders!)

    Zeit und Geld für Features im Blindflug verschwenden? Nicht bei uns. Bevor wir uns in die technische Entwicklung stürzen, finden wir im Detail heraus, was die Nutzer deiner App wirklich brauchen. Welche Probleme möchtest du mit deiner App lösen? Wie fügt sich die App in dein Geschäftsmodell ein? 

    Dazu sprechen wir nicht nur mit dir, sondern ggf. auch direkt mit deinen Nutzern. Natürlich alles 100% vertraulich. 

    Sobald wir gemeinsam diese wichtigen Einblicke gesammelt haben, konzipieren wir Features, die technisch sinnvoll sind und dein Business voranbringen. Die ursprüngliche Aufwandsschätzung kann sich basierend auf den Erkenntnissen aus der Discovery ändern - darüber wirst du stets volle Transparenz haben. 

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    UI & UX Design

    Sobald wir die Bedürfnisse der Nutzer verstanden und die Features konzipiert haben, kümmern wir uns darum, dass die Features nicht nur gut aussehen, sondern sich auch richtig gut anfühlen. Einfach, intuitiv und nahtlos in den Alltag der Nutzer integriert.

    Ob wir uns an den bestehenden Stil deiner Marke anlehnen oder ein ganz neues Design entwickeln – wir verfeinern das UI/UX-Design so lange, bis es nicht nur funktioniert, sondern rundum begeistert. 

    Unsere Herangehensweise spiegelt sich auch in den Designprojekten auf unserer Website wider: Von cleanen, minimalistischen Interfaces bis hin zu kreativen, spielerischen Designs - jede Interaktion soll ein positives Erlebnis sein, nicht nur beim ersten Klick sondern in der regelmäßigen Nutzung. Schau dir unsere Projekte an und entdecke, wie wir Design und Funktion harmonisch zusammenführen.

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    Development & Testing

    Wenn das Design steht, starten wir in einen bewährten Entwicklungsprozess: Von der technischen Planung über die iterative Umsetzung bis hin zur Qualitätssicherung. So stellen wir sicher, dass der Übergang vom Design zur Realität für dich reibungslos abläuft. 

    Wir sind stolz auf unsere gründliche Qualitätsprüfung: Wir führen kontinuierlich sowohl manuelle als auch automatisierte Tests durch, um sicherzustellen, dass alle Features stabil und zuverlässig laufen und das Design in jeder Hinsicht umgesetzt wird. Sollte doch mal ein Fehler auftreten, kümmern wir uns umgehend um die Behebung.

    Regelmäßig zeigen wir dir den aktuellen Fortschritt und holen dein Feedback ein. Änderungswünsche? Dank unseres flexiblen Teams können wir sie schnell und effizient einarbeiten. So wirst du Schritt für Schritt schon bald deine eigene App in den Händen halten!

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    Deployment

    Sobald alle Features entwickelt und getestet sind, geht es zum Launch – der Moment, in dem deine Vision zur Realität wird. Bei mobilen Apps stellen wir sicher, dass alle Anforderungen von Apple und Google erfüllt sind, damit deine App auch tatsächlich die Freigabe der App Stores erhält.

    Während des Go-Live stehen wir dir zur Seite, um schnell auf Herausforderungen zu reagieren und deine App erfolgreich in die Hände der Nutzer zu bringen.

    Außerdem sorgen wir dafür, dass die technische Infrastruktur stabil und skalierbar ist, damit dein Produkt auch bei steigenden Nutzerzahlen zuverlässig funktioniert. Dank automatisierter Abläufe und regelmäßiger Tests garantieren wir, dass der Übergang von der Entwicklung zum Live-Betrieb reibungslos verläuft.

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    Repeat & Grow

    Unsere Arbeit endet nicht mit dem Launch – wir begleiten dich langfristig auf deinem Wachstumspfad. Während dein Business wächst, stellen wir sicher, dass auch deine App sich kontinuierlich weiterentwickelt.

     Wir sammeln Feedback deiner Nutzer, optimieren Funktionen und sorgen dafür, dass dein Produkt immer einen Schritt voraus bleibt. Mit regelmäßigen technischen Updates halten wir deine App sicher, leistungsstark und skalierbar, damit sie bei steigendem Funktionsumfang und wachsender Nutzerzahl flexibel und stabil bleibt. 

    Wir arbeiten eng mit dir zusammen, damit jede Erweiterung genau das ist, was du für das Wachstum deines Unternehmens benötigst – immer im Einklang mit deinen langfristigen Zielen.

Everything your App Needs to Succeed

Beyond the core mobile or web app, we implement the supporting systems that make your product scalable, maintainable, and commercially viable — such as:

  • Payment Solutions

    • One-time app purchases and subscription models
    • In-app purchases and additional paid features
    • Apple Pay & Google Pay
  • Product Analytics

    • For analyzing user behavior (GDPR-compliant)
    • For monitoring app performance
    • E.g. with Mixpanel & Google Analytics
  • Additional Third-Party Integrations

    • To extend your core app with carefully selected external services
    • E.g. messaging and chat solutions, translation technologies, or calendar integrations

Can We Do AI?

Yes, absolutely! Janina, founder of Fishtail Product Lab, has been developing complex AI-based language models since her master’s studies in computational linguistics — long before ChatGPT became mainstream.

Get in touch, and together we’ll explore how AI-powered features (like chatbots) can take your app business to the next level.Sprich uns an, und gemeinsam finden wir heraus, wie KI-basierte Features (wie zum Beispiel Chatbots) dein App-Business auf das nächste Level heben können.

Who’s the Right Fit for Your App Project?

Many apps don’t fail because of the wrong idea — they fail because of the wrong partner. Agencies deliver cookie-cutter solutions, low-cost developers don’t understand your users' needs, and freelancers can’t scale. Fishtail Product Lab stands for custom development, reliability, and growth. See the difference for yourself:

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Apps by Fishtail Product Lab

Your all-in-one partner for launch and growth
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Fancy Generic Agencies

Overpriced template recycling
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Low-Cost Overseas Developers

Rock-bottom prices without understanding your users
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Freelancers from Upwork & Co.

No end-to-end team, no scalability
Affordable
✓ For service businesses starting their digital aspirations
✗
✓
✓
Custom
✓ No templates, fully tailored to your business
✗
✗
✗
Personal
✓ Your product managed by CEO
✗
✗
✓
Experienced
✓ Collectively developed over 20 apps
✓
✓
✗
Reliable
✓ HQ & leadership in Germany
✓
✗
✗
Market & User Focused
✓ Market understanding and user research
✗
✗
✗
Complete End-to-End Package
✓ Discover, Design, Develop, Deploy
✗
✗
✗
Built for Growth
✓ Scalable, live apps — not just prototypes
✗
✗
✗
Feature icon

Apps by Fishtail Product Lab

Your all-in-one partner for launch and growth
Affordable
✓ For service businesses starting their digital aspirations
Custom
✓ No templates, fully tailored to your business
Personal
✓ Your product managed by CEO
Experienced
✓ Collectively developed over 20 apps
Reliable
✓ HQ & leadership in Germany
Market & User Focused
✓ Market understanding and user research
Complete End-to-End Package
✓ Discover, Design, Develop, Deploy
Built for Growth
✓ Scalable, live apps — not just prototypes
Emoji icon 1f3f7.svg

Fancy Generic Agencies

Overpriced template recycling
Affordable
✗
Custom
✗
Personal
✗
Experienced
✓
Reliable
✓
Market & User Focused
✗
Complete End-to-End Package
✗
Built for Growth
✗
Emoji icon 1f30e.svg

Low-Cost Overseas Developers

Rock-bottom prices without understanding your users
Affordable
✓
Custom
✗
Personal
✗
Experienced
✓
Reliable
✗
Market & User Focused
✗
Complete End-to-End Package
✗
Built for Growth
✗
Emoji icon 1f3c4-1f3fd-200d-2642-fe0f.svg

Freelancers from Upwork & Co.

No end-to-end team, no scalability
Affordable
✓
Custom
✗
Personal
✓
Experienced
✗
Reliable
✗
Market & User Focused
✗
Complete End-to-End Package
✗
Built for Growth
✗

Your Customer Data, Your Rules

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    Data Hosted Wherever You Want

    Where your app’s data lives is entirely up to you — in the U.S., EU, or any cloud provider you choose. The location of our development team does not affect where your customer data is stored and processed.

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    Built-In IT Security

    We follow best practices for technical and organizational security, and can coordinate security audits or penetration tests if needed.

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    Trusted Legal Partner

    Your contract is with a professional, insured development partner, giving you peace of mind that your project is handled responsibly and reliably.

About Us

We are an international collective of entrepreneurs, product managers, and tech talent.

Together, we’ve delivered over 20 mobile and web apps for clients across Europe, North America, and Asia. For your app idea, we assemble a dedicated design and development team from our talent pool, led by experienced product managers to ensure your project succeeds.

  • Fishtail Product Lab Janina
    Janina - Founder, CEO & Point of Contact

    Hi! 🙌 I’m Janina. I founded Fishtail Product Lab three years ago. I bring expertise in linguistics, business, and computational technology and have spent the last five years co-developing AI applications and launching new tech products.

    I’m especially proud of our flagship product, sanu — an investor-backed app designed to bridge the caregiving gap in Europe. Today, at Fishtail Product Lab, I help bring new apps from scratch to market for our clients.

    My mission is simple: to collaborate with visionary minds and develop outstanding apps from zero to launch 🌟

Our Tech Stack

We focus on modern, scalable, and secure technologies to build mobile and web apps that drive your business forward.

Frontend & Web Apps

Cross-Platform Mobile App

Backend

Database, Infrastructure, CI/CD

Our Trusted Partners

What Every App Founder Needs to Know

App-Entwicklung München App-Entwicklung München

5 Uncomfortable Truths about Apps

3 Min
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4 Insider-Tipps: Worauf du bei der Wahl deines App-Entwicklers achten solltest

2 Min
App-Entwicklung München App-Entwicklung München

GenAI: Jetzt ist die beste Zeit für Apps

3 Min
App-Entwicklung München App-Entwicklung München

Warum Offshoring abliefert - wenn man es richtig macht

3 Min
App-Entwicklung München App-Entwicklung München

Was darf bei keiner großartigen App fehlen?

3 Min
App-Entwicklung München App-Entwicklung München

Fallstudie: Produktqualität vor Umsatz - Warum ein Nein oft besser ist

4 Min

Bevor du unterschreibst: Schau dir das Angebot genau an!

4 Min

Questions?

Check out our FAQs or get in touch! 😀 We’d love to hear from you.

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